The number of hydrogen atoms present in 5.4 g of urea is:
(Given: Molar mass of urea : $60 \mathrm{~g} \mathrm{~mol}^{-1}$
$\mathrm{N}_{\mathrm{A}}: 6.022 \times 10^{23}$ particles $\mathrm{mol}^{-1}$ )
$1.084 \times 10^{23}$
$1.084 \times 10^{22}$
$2.168 \times 10^{22}$
$2.168 \times 10^{23}$
Identify the incorrect statement from the following:
Nitrogen can form $p \pi-p \pi$ multiple bonds with itself.
$\quad \mathrm{P}\left(\mathrm{C}_2 \mathrm{H}_5\right)_3$ and $\mathrm{As}\left(\mathrm{C}_6 \mathrm{H}_5\right)_3$ form $\mathrm{d} \pi-\mathrm{d} \pi$ bond with transition metals.
Phosphorus, arsenic and antimony show catenation property.
Nitrogen can form $d \pi-p \pi$ bond with oxygen.
Which one of the following is an ambidentate ligand?
Ethane-1,2-diamine
Ethylenediaminetetraacetate ion
Thiocyanate
Oxalate
The correct order of increasing metallic character of $\mathrm{Na}, \mathrm{Be}, \mathrm{P}, \mathrm{Mg}$ and Si is
$\mathrm{P}<\mathrm{Si}<\mathrm{Be}<\mathrm{Mg}<\mathrm{Na}$
$\mathrm{P}<\mathrm{Si}<\mathrm{Na}<\mathrm{Mg}<\mathrm{Be}$
$\mathrm{P}<\mathrm{Mg}<\mathrm{Be}<\mathrm{Si}<\mathrm{Na}$
$\mathrm{Be}<\mathrm{Si}<\mathrm{P}<\mathrm{Mg}<\mathrm{Na}$
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